Not Ex (LDR) need advice

Hello.

I will make a short as possible.
actually me and my bf doing LDR for almost 2.5 year and he will continue to work there.
Last I met him is 1.3 year ago.

this end of month he will get home to meet me.

last month I saw his massage in ig. He send a pic about underware to a woman and he told her to buy it.

He didnt know that I know his ig password.

I let it go about that massage.
and the just las week.
He comment in her story said “love you”.

I’m so confuse. what I suppose to do…
Should I confront him and let his go or forgive him if he still choose me.
Ps : we are in 10 y.o relationship. He also still care about me.He alone in that city ni family or close friend.